I've had this same issue. It seems to start happening when the device enters sleep mode, it's like the printer just vanishes. When you remove the printer completely and reinstall it it works again until the printer goes into sleep mode then it disappears again. I've had two do this and once they start I haven't found any way to stop it from happening periodically and with ever increasing frequency until we finally get rid of them. Suspect some level of i/o controller or board failure.

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Related Questions:

If you tell it to print and the item goes into your Que for printing. In that screen click on the printer tab... In the drop down verify that the "Use Printer OffLine" does NOT have a check mark next to it.

If the printer does not have a USB port and the computer does not have a parallel port then you will need to get a USB to Parallel print adapter. One end is USB to plug into the computer and the other end has a standard parallel port to plug into the printer. Install instructions will come with the adapter. Try any computer shop such as Best Buy, Radio Shack, etc etc.

How are you connecting the printer to the computer? (USB, parallel, ethernet) Make sure there are no error messages/lights blinking and that the unit is on.

If you are using an USB cable, try a new cable. Also try a direct connection if you have a USB hub or print server in use. Make sure the USB ports are active (not disabled for power saving or security). Test the port with a known working device.

If you are using the parallel cable, make sure it is properly secured. Also try a new cable. Again try a direct connection instead of a print server.

If you are using an ethernet connection, again try a new cable. Check if your firewall is blocking communication with the printer. (Test this by temporarily turning off the firewall. If it starts working, make the printer a trusted part of the network. With some firewalls, you may need to unblock communication for both incoming and outgoing communication with the printer.)

The first thing I recommend you try is a new data cable. Scanners require bi-directional communication and will fail even when the printer works. Similarly go for a direct connection instead of using a print server or USB hub. (I have a scanner that had the same problem - the preview scan started but no image saved due to a bad cable.) If you are using a parallel port connection, make sure that bi-directional communication is set for the port (in the BIOS). If you use a USB to parallel port adapter, make sure it is a bi-directional (for scanner) adapter.

You can't have a double hook up to it,When the parallel port is used the usb port is disabled and when you use the usb port the parallel port is disable.This is done to prevent damage to the printer.You can network the laptop with the pc and print that way though